A 15-year-old boy survived atop a fishing vessel after it capsized in frigid waters off the coast of Alaska, while his two crew members died, according to the U.S. Coast Guard.

The Coast Guard pilot who spotted the lone survivor sitting atop the overturned boat in the Bering Sea called the rescue an “emotional roller coaster” in an interview with ABC News on Thursday.

“We are beyond excited and beyond grateful that we found him, and at the same time, we are overwhelmingly remorseful that we didn’t find the other two in time,” Lt. Cmdr. Jonathon Resch told ABC News correspondent Trevor Ault.

The 18-foot fishing vessel had departed Savoonga on St. Lawrence Island on Friday and was due back early Sunday, according to the Coast Guard. It was reported overdue Sunday night, prompting the search and rescue effort.

Due to weather conditions, the Coast Guard HC-130 Hercules aircrew wasn’t able to begin the search until Monday, according to the Coast Guard.

Resch spotted the teen sitting on top of the skiff Monday morning approximately 4 miles from St. Lawrence Island, calling it “nothing short of miraculous.”

“People don’t survive those scenarios,” he said. “People don’t flip boats and survive nights. They don’t do it in warm water, let alone in water that’s, you know, 40 degrees.”

The Coast Guard coordinated the rescue with a nearby good Samaritan vessel, Northwest Explorer.

The aircrew dropped flares and life rafts in the water to increase the visibility of the teen’s overturned boat while waiting for the Northwest Explorer to arrive, Resch said.

“That’s another miracle in itself,” Resch said of the boat rescue.

Video of the rescue showed the teen kneeling on the overturned skiff as he’s reeled in with a heaving line and then brought aboard the Northwest Explorer fishing vessel.

The 15-year-old survivor had symptoms of hypothermia, the Coast Guard said. The two deceased boaters were recovered from the water and transported along with the survivor to Nome.

The Coast Guard has not released the names of the deceased boaters or the survivor.

“Our hearts go out to the families, friends, and communities affected by the tragic loss of these two mariners,” Rear Adm. Bob Little, the commander of the Arctic District, said in a statement. “We are grateful for the incredible efforts of the motor vessel Northwest Explorer, Federal, State, Village first responders and mission partners who assisted in the effort that resulted in a life saved.”